/*
 * Copyright 2025 LinQingYing. and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * The use of this source code is governed by the Apache License 2.0,
 * which allows users to freely use, modify, and distribute the code,
 * provided they adhere to the terms of the license.
 *
 * The software is provided "as-is", and the authors are not responsible for
 * any damages or issues arising from its use.
 *
 */

package org.cangnova.cangjie.cjpm.toml.completion

import org.cangnova.cangjie.cjpm.toml.StringValueInsertionHandler
import org.cangnova.cangjie.cjpm.toml.getClosestKeyValueAncestor
import com.intellij.codeInsight.completion.CompletionParameters
import com.intellij.codeInsight.completion.CompletionProvider
import com.intellij.codeInsight.completion.CompletionResultSet
import com.intellij.codeInsight.lookup.LookupElementBuilder
import com.intellij.util.ProcessingContext

class CjpmTomlKnownValuesCompletionProvider(private val knownValues: List<String>) :
    CompletionProvider<CompletionParameters>() {
    override fun addCompletions(
        parameters: CompletionParameters,
        context: ProcessingContext,
        result: CompletionResultSet
    ) {
        val keyValue = getClosestKeyValueAncestor(parameters.position) ?: return
        result.addAllElements(knownValues.map {
            LookupElementBuilder.create(it).withInsertHandler(
                StringValueInsertionHandler(keyValue)
            )
        })
    }
}